Improvement in locks



dimitri SILAS N. BEooKS,l 0E BERNAEESTQN, MASSACHUSETTS, ADMINISTRATOR 0E THE ESTATE or LINUS YALE, JE., DEcEASED.

Letters .Patent No. 9d,865, dated October` 12, 1869.

IMPROVEMENT IN LOCKS.

The Schedule referred to :ln these Letters Patent and making part of the same.

` specification of the same,

The object of the. said invention is'to render rotary locks unpickable; and

The invention consists, first, of the combination of a turning-slide with theholt, and with a stop, in such manner that when the slide is turned without being properly set, the stop is interposed in the path ofthe lock-bolt or its connections, so that the lock-bolt cannot then be unlocked.

The invention consists, further, of the combination of the turning-slide', the bolt, and the stop, with a 'movable turniug-detent, which, in case the slide is not properly set, is caused to turn with the slide and to permit the stop to act upon the lock-holt, so as to prevent the unlocking of the latter.

The invention is otl great advantage,when applied to the well-known Bramah lock and, in order that it may be understood, there is represented, in the accompany'ing drawing, a Brama-block constructed upon the principle of this invention, which I will proceed to describe.

In the said drawings- Figure l represents a side view of the look; A

Figure 2 represents an edge view of it, viewed in the line of movement of the bolt;

Figure 3 represents an edge view of it, viewed at right angles to the line of movement of the bolt;

Figure 4 represents a section4 of the lock, at the line x x of g.v 3; f

Figure 5 represents \a 'section of the lock, at the line x x of'g. 4;

Figure 6 represents a section of the lock, at the line y y ofg. 4;

Figures 7 to 12 inclusive, represent views of parts oi' the lock, designated by the same letters as the corresponding parts in the preceding figures; and Figures 13, 14, andl, represent views of the key of the lock.

The said lock is constructed with a lock-plate, A,

v with which the other parts are connected, and which is perforated with holes, for the insertion of the screws by which the lock is made fast to the door or other article to be secured by it.

The working-parts of the lockere coveredby a case, B, which is secured to the lock-plate A.

The lock represented has a'series of slides, a a, each of which is constructed to slide endwise vin a groove, formed in the turning slide-cylinder O; and the slide-cylinder .is arranged to turn upon its longitudinal axis in ti`i e. cylindrical part d of the case B, the inner end of the slide-cylinder being held in position by the ring-bracket E, in which that; end turns.

The bolt D is constructed to slide crosswise to the axis of the slide-cylinder, its end b. moving through an opening formed for .the purpose in the. lock-plate A, and its stoekfbeing peribratedwth an opening ofthe same breadth as` the circular periphery of the ring-bracket E, upon which the said stock slides when the bolt is shot outward or drawn inward.

In older that the turning of the slide-cylinder may effect the movement ofthe bolt, a cani or wiper, g, is provided, to be turned by the former, and tn operate upon vthe latter.

This cam g has aring-stock, m, which fits upon the slide-cylinder, and the interior of this stock is provided with projections e e, which fit into `longitudinal tintes, formed in the exterior of the slide-cylinder C,

between the slide-grooves, so that, when the cylinder is turned, the cam is compelled to turn with it.

The ring-cam stock is supported by the ring-bracket E, being constructed to turnin a vslot formed therein.

The stock f, of the bolt, has two projections, 1th',

iig. 8, upon the' end c of one (h) of which the cani g operates when turned to unlock the bolt, while the cam operates upon the end c o t' the other projection h', when the cam is turned to lock the bolt. v

Each projection is curved interiorly, to permit the cam to turn a portion of a revolution after and before the bolt is moved, the extent of movement of the cam being suicient to bring the key-bit t to the-notch j or j', by which it is permitted to withdraw from or to'enter through the escutcheonfplate k of the lockcase B.

Each slide c is constructed, as represented at iig. 12,'with a fingerl or lug, s, which projects 'through a slot, Z,\in the slide-cylinder, into the interior of the same, to be operated upon by a sliding collar, n, which is pressed outward or toward the key-'hole bya spring, J, so that all the slides, when not operated upon by the key G, are forced outward into close proximity with the inner face of the escutcheon-plate It of the case B. v

The spring J is fitted upon the stem I, to which the vpipe p ofthe key G is applied when the lock is to be locked or unlocked.

Each slide a is constructed with a notch, lr, in its outer edge, and the notches of the several slides are arranged at different distances from their outer ends, so that thel slides have to be moved different distances, in order that their respective notches may all be set opposite a ring-groove, t, formed in the periphery ot' the slide-cylinder. The detent Lis arranged in this lgroove, its stock 'v heilig of ring form, and being fitted to turn freely a, so that the said slides may then be moved endwise through said notches, for the purpose of setting the notches ofthe slides opposite the ring-groove in which Ythe detent stock is'placed.v .The portions lw, of the detent stock,- between theI detent notches, project within the circle drawn around the outer edges of the slides a, but not quite as far as the circle drawn around the bottoms of the slide-notches fr.; hence, if every slide be set so that its notch r is opposite the ring-groove of the cylinder,.the slides will turn with the cylinder, and will pass the projections of the detent without moving it, the notches of the slides -moving overthe projections w, of the detent, which can then remain at rest; while, if the cylinder and slides be turned upon the axis of the cylinder when the notch of any one of the slides does not correspond in position with the ring-groove t of the cylinder, the'body of that slide will come in contact with the adjacent projection of the stock of the detent, and will compel the detent to turn with it.

The detent L has, at itsexterior, a tongue, x, which, when the detent is in its normal position, as represented at figs. A4: and 5, overlaps the stop N, by which the movement of the bolt is stopped when necessary.

This stop'is, in this example, constructed in one piece, with a spring, z, which tends to move it laterally from the adjacent face of the lock-case B, to which it is secured, and to intel-pose it. behind 'a shoulder, q, of the -lock-bolt, as represented in iig. 9,

in which position it presents an effectual obstacle to.' v the movement of the bolt.

When'the bolt is locked, the stop N is held toward the lock-case and out of engagement with the shoulder q of the bolt, by the pressure of theside of the cam vg,

f which projects slightly beyond the detent for this purpose, and the stop in this, its vnormal position, is overlapped by the tongue a: of the detent, so that when the cam gis turned to move' the bolt, and then ceases to hold the stop, the stop is prevented from interpos- 'ing .itself in the way of the bolt lby the presence of the detent.

If, however, the detent be turned from its normal position ,by the action of any improperly set slide, the

detent, being out of the way ofthe stop, permits it to be moved laterally by its spring z, as represented at iig. 9, until it interposes itself behind the shoulder q of the lock-bolt, and effectually stops its movement; and, as this is done without producing friction upon the slides a, it is practicaily impossible to discover which one of the slides has been improperly set,- and has, in consequence, prevented the bolt from heilig unlocked.

In order that the detenrnmay be thus restored, the

stop N must first be pushed back to its place, near the lock-case, in order that its edges may not obstruct the movement of the detent; this backward movement of the stop is effected by the cam g, whose side, adjacent to the face of the stop, is inclined so as to operate upon the ring-spring z, with which the stopv N is connected,and push the spring, with the stop, to their positions, when ,the slide-cylinder and detent are turned back to the positions they occupy when the A'bolt is locked.

As the movement of the cylinder turns the cam g about a quarter of a revolution beforeit begins to operate upon the stock'of the bolt, the cam'is moved suciently'to permit the stop to interpose itself in the '-way of the bolt before the cam is in position toact' upon `the bolt.v

The key G, of the lock,-is constructed with a bit, t',

to enter through the escutcheon-plate-k, into a groove, y, in the interior of the cylinder, andturn it.

The keyis also constructed with a series of' notches, o, corres lending in position with the slides' at each side'of lt e keybit,when the key iS. l-ppliedto'the lock; and the lengthsof these notches are such that when the key is applied to the lock'each slide is moved by the solid shoulder s' of the respective slot until the :notch of the slide corresponds in posit-ion with the ring-groove of the slide-cylinder, so that the bolt can then be unlocked.

V'In 'practice it isv found expedient to con-struct the l slides with a' spring body, as at 1", g. .12,"and to curve them slightly, so that their own weight will notmove them in their grooves in the slide-cylinder this construction, however, forms no part of `the invention.

What is claimed as the invention of said LINUS YALE, deceased, is#- The combination of the turning-slide, lock-bolt,and stop, all constructed, to operate substantially as be /for'e set forth.

Also, the combination of the turning-slide, bolt, stop, and detent, all constructed t0 operatesubstantially as before' set forth. l

In testimony whereof, I have hereunto set my hand, this 7th day 'of July, AJD: 1869.

SILAS N. BROOKS.

\Vitnesses:

J No. B. YALE, CHESTER O. CoNAN'r. 

